Screening Stocks by Trading Amplitude, Calendar Year, and Listing Age

Summary

This stock-screening proposal combines daily price amplitude above 1%, a calendar-year filter for 2021, and a requirement that a stock have been listed longer than a specified period. The accompanying examples operationalize listing age as more than a year in one indicator formula, while the Python example accepts a configurable number of years and excludes ChiNext-like listings identified by a code prefix. The article provides no backtest or evidence that these criteria improve returns.

The post interprets higher amplitude as greater price movement and longer listing history as a possible sign of maturity. It also claims that the 2021 filter identifies stocks with favorable conditions, but does not explain the selection basis. The author cautions that a long listing history does not guarantee company strength or promising industry prospects, and that the screen can exclude newer listings. Suggested refinements include examining financial data and industry policy and dividing listing age into bands. The rules are underspecified: the required listing period is left open, and the examples use differing amplitude denominators.

Key ideas

• The proposed screen filters for daily amplitude above 1%, stocks associated with 2021, and a minimum listing age.
• One example uses a one-year listing threshold, while the Python example makes that threshold configurable.
• The post offers no performance evidence for the screen or for its claim about the 2021 filter.
• Longer listing history may exclude new-stock opportunities and does not prove business quality.
• The examples differ in how they calculate amplitude, and the required listing-age threshold is not fixed.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.